Cloud Firestore documentation

Beta

This is
a beta
release of Cloud Firestore.
This product
might be changed in backward-incompatible ways
and
is not
subject to any SLA or deprecation policy.

Cloud Firestore is a NoSQL document database built for automatic scaling, high
performance, and ease of application development. While the
Cloud Firestore interface has many of the same features as traditional
databases, as a NoSQL database it differs from them in the way it describes
relationships between data objects.